Automatic cut-off.



FERDINAND HOELDER AND CHARLES J. WELZIN, OF NEW YORK, N. Y.

AUTOMATIC CUT-OFF.

Specification of Letters Patent.

Patented. Dec. 31, 1907'.

- Application filed August 10. 1906. Serial No. 330,060.

To all whom it 'may concern:

Be it known that we, FERDINAND HoEL- DER and CHARLES J. WELZIN, citizens of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Automatic Out-Offs, of which the following is a specification.

This invention relates to new and useful improvements in automatic out offs and relates articularly to a cut off mechanism embo ying a fusible connection designed to be broken under extreme heat for normally holding the cut off valve in open position.

The invention is especially designed as an improvement upon our former patent N o. 800,740 and particularly comprises a remov able plug carrying a slidable valve and in this connection it is a primary object of the present invention to rovide novel means for guiding the valve 1n Aits slidable movement. whereby said valve may be effectively centered on the valve seat.

The invention aims as a further object to provide a novel fusible connection having the functionl above stated.

The detailed construction will appear in the course of the following description in which reference is had to the accompanying drawings forming a part of this specification, like numerals designating like parts throughout the several views, wherein,

Figure 1 is a central longitudinal section of an apparatus constructed in accordance with our invention. Fig. 2 is a central longitudinal section of the removable plug embodying the cut off valve in its closed position. Fig. 3 is a rear elevation of said plug,

and Fig. 4 is a section similar to Fig. 2, showing the cut-off valve in its open position.

In the practical embodying of the invention, the letter A designates a T coupling provided with a vertical arm 1 and registering horizontal arms 2 and 3. The arm l has connection with a distribution pipe '4 and the arm 2 has connection with a supply pipe 5. A plug 6 which carries the cut-ofi` mechanism is secured in the arm 3 and to this end is formed with a tapered threaded surface 7 by which said plug has detachable connection with said arm. The plug 6 is formed with an axial cylindrical bore 8 and in its rear wall with a reduced central o pening 9, communicatingwith said bore. A sleeve 10 fits snugly within the bore 8 and has slidable movement therein. Moupted axially of the sleeve 10is a valve stem 11 which projects at its rear end into the opening 9 and at its forward end terminates in an enlarged threaded portion 12 by which said stem 11 has connection with the sleeve 10, a flange 12L being provided upon the enlarged portion 12 exteriorly of the lug 6 and bearing against said plug. A exible valve head is detachably secured to the flange 12a by a screw 14 and confronts a concaved annular valve seat 15 formed upon the end of the supply pipe 5 and upon which the valve head 13 is designed to seat. The stem 11 is normally held with the fiange 12a abutting the plug 6 by a fusible connection embodying a screw 16 carried by said plug and a fusible washer 17, consisting of fuse metal and a paper washer surrounding said screw and bearing against the rear face of the plu(T 6. An expansive coil spring 18 surroun( s the stern 11, one end of saids ring bearing against the rear wall of the ug 6 and the other end bearing against t e enlarged portion 12.

In operation, in the event of fire or a dangerously high temperature which would tend to heat the pipes and to cause an explosion' of the gas, the fuse washer 17 will melt and destroy the connection between the sleeve 10 and the plug 6. The spring 18 then exerts its pressure to force the plug 6 outwardly as shown in Fig. 3 and in dotted lines in Fig. 1.' The plug 6 in its outward movement carries the head 12 until the latter is centered upon the valve seat 15 to shut off the supply of gas. In the sudden outward movement of. the sleeve 10 the bore 8 serves to guide and center said sleeve in order that the valve head 13 may have a perfectly true seating and in sure perfect safety against the escape of gas.

l/Vhile the elements herein shown and described are well adapted to serve the functions set forth, it is obvious that various minor changes may be made in the propor-l tions, shape and arrangement of theseveral parts without departing from the spirit and scope of the invention as defined in the app slid ably mounted in said plug axially thereof,

' cent one leg with a valve seat, a hollow re-v in a valve stern terminating in an enlarged pormovable plug mounted in the opposing leg and confronting said valve seat, a sleeve slidably mounted in said plug axially thereof, a valve stem terminating in an enlarged portion threaded Within the end of said sleeve and a flexible valve head beyond said threaded portion, said valve stem projecting 20 through said plug and being held therein by exterior fusible connections secured to the projecting end of said stem, an expansive coil spring surrounding said stern and bearing with one end against said plug and a 25 valve head carried by said valve stem.

` In testimony whereof I affix my signature in presence of tWo Witnesses.

FERDINAND HOELDER. CHARLES J. WELZIN.

Witnesses:

GEORGE H. FRASER, P. FELS. 

